Cleanup: Remove Outliner C-API headers/wrappers

Basically this removes any C <-> C++ glue code. C++ types are accessed
directly via the public C++ APIs.
Contains some related changes like, moving functions that were
previously declared in a now removed header to a different file, whose
header is the more appropriate place (and the source file as well).
But generally I tried to avoid other changes.

1 files changed, 24 insertions, 3 deletions

diff --git a/source/blender/editors/space_outliner/tree/tree_display.hh b/source/blender/editors/space_outliner/tree/tree_display.hh
index bf9cf18948c..d6085770965 100644
--- a/source/blender/editors/space_outliner/tree/tree_display.hh
+++ b/source/blender/editors/space_outliner/tree/tree_display.hh
@@ -34,16 +34,30 @@
 
 #pragma once
 
-#include "tree_display.h"
+#include <memory>
 
+struct ID;
+struct LayerCollection;
 struct ListBase;
+struct Library;
 struct Main;
+struct Scene;
+struct Sequence;
 struct SpaceOutliner;
 struct TreeElement;
-struct TreeSourceData;
+struct ViewLayer;
 
 namespace blender::ed::outliner {
 
+/**
+ * \brief The data to build the tree from.
+ */
+struct TreeSourceData {
+  Main *bmain;
+  Scene *scene;
+  ViewLayer *view_layer;
+};
+
 /* -------------------------------------------------------------------- */
 /* Tree-Display Interface */
 
@@ -65,13 +79,20 @@ class AbstractTreeDisplay {
    */
   virtual ListBase buildTree(const TreeSourceData &source_data) = 0;
 
-  bool has_warnings = false;
+  /** Accessor to whether given tree has some warnings to display. */
+  bool hasWarnings() const;
 
  protected:
+  bool has_warnings = false;
+
   /** All derived classes will need a handle to this, so storing it in the base for convenience. */
   SpaceOutliner &space_outliner_;
 };
 
+AbstractTreeDisplay *outliner_tree_display_create(int /*eSpaceOutliner_Mode*/ mode,
+                                                  SpaceOutliner *space_outliner);
+void outliner_tree_display_destroy(AbstractTreeDisplay **tree_display);
+
 /* -------------------------------------------------------------------- */
 /* View Layer Tree-Display */